Manufacture of gear-wheels.



F. A. BRUN. MANUFACTURE OF GEAR WHEELS.

APPLICATION FILED MAY 26, 1905.

. Patented Oct. 5, 1909. 2 SHEETS-SHEE'I 1 P. A. BRUN. MANUFACTURE OF GEAR WHEELS. APPLICATION FILED MAY 26, 1905.

Patented 0011.5, 1909.

2 SHEETS-SHEET 2.

. devices.

mum, on rams, FRANCE.

NUFJh-GTUBE OE GEABJIJHEELS;

Specification of Letters-Eaten.

Patented @ct. 5, race.

Application filedmay 26, 1905. fierial No. 262,590.

To all whom it may concern:

Be it known that I, Fniionaio Anuimin BRUN, a citizen of the French Republic, residing at Paris, France, have invented certain new and useful Improvements in the Manufacture of Gear-lVheels, of which the following is a specification.

This invention relates to an improved method and apparatus for the manufacture of gear wheels by laminating and circumferential impressing.

In the annexed drawing Figure 1 is a diagrammatic plan-view of the apparatus for carrying out the improved method. Fig. 2 is a detail view representing a cutting wheel or roller for forming the teeth of the gear-wheels, and Figs. 3 and 4: are detail views representing the work ready to be finished or dressed. Fig. 5 is a plan view of the impressing apparatus apart from the laminating apparatus, Fig. 6 is a partial side view re resenting the impressing wheel and the finis ing wheel, and Fig. 7 is a plan view of an impressing device mounted on a laminating device.

The manner in which the method is carried out and the apparatus for doing so is as follows:

A block of metal suitable to the dimensions of the wheel to be manufactured is heated to forging temperature and is then roughly shaped in a stamp or press to the form shown in Figs. 3 and 4. The shaped piece 5 is then placed on the axle 6 (Fig. 1) supported by the bearings 7 and is laminated, while hot, between two inclined laminating rollers 8 (Fig. 1) having their extended axes meeting in the axis of the work, while a suitably toothed loosely mounted impressing roller 9 is caused to act on the outer circumference of the work 5. Rolls 8 are driven through bevels 8 and shafts 8 from gears 8 mounted on shaft 8 The relative positions of the work 5, laminating rollers 8 and impressing roller 9 are regulatable within certain limits by means of worm and screw gear 8 or other suitableadjust-ing The laminating and circular impressing can be simultaneously efi'ected on one machine, or can be carried out by means of diflerent machines so constructed that the laminating can be efiected between the initial and final impressing of'the teeth.

lit the rim is to be exactly calibrated before it is cut, a smooth roller 13 can be substituted for the cutting roller 9. When the calibrating-has been effected the laminating rollers 8*andthe-smooth roller 13 are removed and counter-pressure -or sup porting rollers 10 mounted in adjustable slides 10 are brought in contact with the work 5, an impressing roller 12 being thereupon brought up to produce the teeth on the circumference of the work. The impressing apparatus can thus be rendered in- 7 dependent of the laminating device, and can be mounted on the latter, as shown in Fig. 7 or can be separately arranged as shown in Figs. 5 and 6.

It must be noted that the impressing is efiected without positive connection between the center of the work and the impressing roller, that is to say, it is efiected in the same manner as in a lathe. For this reason only one of the two parts for example the impressing roller, need be positively controlled, the work being automatically movedduring the production of the teeth.

The advantages secured by the method of manufacture described are, firstly, a considerable reduction in the cost and weight of the gear wheels, and secondly, perfect homogeneousness of the metal used, with the resulting increase of strength.

I am aware that the method of laminating is old and that it has also been'proposed to form the teeth by impression, but in this invention the impression takes place only when the rim itself is supported by either the laminating rollers or supporting rollers or disks used in lieu thereof. Thus there is no reaction at the hub of the wheel but all reaction is taken at the rim itself.

What I claim is:

1. The method of manufacturing gear wheels, consisting in subjecting a blank on its periphery to the rolling action of a. tooth impressing device, and simultaneously laminating the blank between its axial and peripheral portions.

2. The method of manufacturing gear wheels, consisting inimpressing teeth in the periphery of a blank and simultaneously laminating said blank behind its peripheral portion and supporting the said peripheral portion by the laminating means.

3. The method of forming a gear wheel, which consists in subjecting the peripheral portion of a properly shaped blanir to the action of impressing means,

initial and final impressing actions, subjecting the blank to the action of laminating means.

4. The method of manufacturing gear 5. The method of manufacturing gearwheels, consisting in rotating a blank and. simultaneously impressing teeth in its peesspse riphery, opposing the radial pressure toward the axial or hub portion of the blank and simultaneously laminating the blank between its axial or hub portion and the peripheral portion during the impressing ofteeth in said peripheral portion.

In Witness whereof I have signed this F REDERIO AMEDEE BRUN. Witnesses:

MARIUS H EBERLIN,

CHARLES Roman.

specification in the presence of two Witnesses. 2o 

